CN217134621U - End cover assembly, battery monomer, battery and consumer - Google Patents

Abstract

The utility model relates to an end cover subassembly, battery monomer, battery and consumer, a battery monomer is located to end cover subassembly, and end cover subassembly is including covering body, electrode terminal, adaptor and insulating part, and electrode terminal is fixed in the lid body, and the adaptor is used for connecting electrode terminal and the free electrode subassembly of battery, and the insulating part is including the fixed part and the spacing portion that are connected, and the fixed part is located between lid body and the adaptor, and spacing portion is used for supporting and holds the adaptor. A battery monomer comprises a shell, an electrode assembly and the end cover assembly, wherein the shell is provided with an opening, the electrode assembly is arranged in the shell, and the opening is covered by a cover body. A battery comprises the battery cell. An electric device comprises the battery. According to the end cover assembly, the single battery, the battery and the electric equipment, the overcurrent and external short circuit current resistance fusing capability of the end cover assembly is strong, and the condition that the single battery is overheated or fused at local temperature can be reduced.

Description

End cover assembly, battery monomer, battery and consumer

Technical Field

The utility model relates to a power battery technical field especially relates to an end cover subassembly, battery monomer, battery and consumer.

Background

With the popularization and the promotion of new energy automobiles, the charging and discharging performance, the cruising ability and the like of the new energy automobiles increasingly attract people's attention and attention. The power battery is a rechargeable battery, is a power source of new energy automobiles, and is widely applied to the field of the new energy automobiles.

The service life of the battery is an important reference index, and the battery is easy to deform or damage due to vibration stress during transportation or when applied to moving equipment which can be subjected to vibration, so that the service life is terminated. In order to prevent the battery from being damaged, the casing and the cover plate of the battery are often made of high-strength and wear-resistant materials to improve the external structural strength of the battery. However, after the external structural strength of the battery is improved, the battery is still damaged after being moved or vibrated, and the situation that the local temperature of the battery is overheated or fused due to insufficient overcurrent of the adapter at the moment still exists.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide an end cap assembly, a battery cell, a battery and an electric device, aiming at the problem that the adapter is insufficient in overcurrent and can cause local temperature overheating or fusing of the battery.

The utility model provides a battery monomer is located to end cover subassembly, and end cover subassembly includes lid body, electrode terminal, adaptor and insulating part, and electrode terminal is fixed in the lid body, and the adaptor is used for connecting electrode terminal and the free electrode subassembly of battery, and the insulating part is including fixed part and the spacing portion that is connected, and the fixed part is located between lid body and the adaptor, and spacing portion is used for holding the adaptor. According to the end cover assembly, when the single battery is moved or vibrated, the amplitude of the adapter piece in the moving or vibrating process can be limited through the limiting part of the insulating piece, and the problem that the connecting position of the adapter piece and the electrode terminal is deformed or damaged due to repeated vibration stress is solved; meanwhile, a hole structure matched with the insulating part is not required to be additionally arranged on the adapter, the overcurrent and external short circuit current fusing resistance of the adapter can be improved, and the condition that local temperature is overheated or fused due to insufficient overcurrent of the adapter is reduced.

In some embodiments, the fixing portion includes a side surface and an end surface located at a different side from the side surface, the cover body and the adaptor are connected to the end surface, and the limiting portion is connected to the side surface. Therefore, the insulating part can be arranged between the cover body and the adapter part to play the roles of insulation and vibration reduction, the limiting effect of the limiting part on the adapter part is not influenced, and the structural design is simple and reasonable.

In some embodiments, the fixing portion includes at least two side surfaces, and the limiting portion is disposed on any one side surface to limit the adaptor from any one side of the insulator. So, through locating any side of fixed part with spacing portion, all can realize spacing to the connecting piece in arbitrary side of insulating part, the setting of spacing portion is more nimble.

In some embodiments, the fixing portion includes at least two side surfaces, and at least two side surfaces of all the side surfaces are provided with limiting portions to limit the adaptor from at least two sides of the insulating member. Therefore, the fixing part is provided with at least two side faces provided with limiting parts, and the limiting and vibration damping effects of the limiting parts of the insulating part on the connecting part can be enhanced.

In some embodiments, the corresponding limiting parts on each two opposite sides are at least partially overlapped. Therefore, the limiting parts arranged on the two opposite sides of the fixing part are lapped, and the limiting effect of the limiting parts on the connecting piece can be further enhanced.

In some embodiments, the two opposite side surfaces have positioning holes on the corresponding limiting portion of one side surface, and positioning posts are disposed on the corresponding limiting portion of the other side surface, and the positioning posts are inserted into the positioning holes when the two limiting portions are overlapped. Therefore, the limiting parts on the two opposite sides of the fixing part can be fixedly lapped, and heat can be prevented from being transferred to the electrode assembly of the battery cell.

In some embodiments, the limiting portion includes a connecting section and a limiting section, the connecting section is connected to the side surface of the fixing portion, and the limiting section is used for abutting against the adapter. So, connect in the basis of fixed part at the linkage segment of spacing portion, spacing section of spacing portion can be spacing to the adaptor, and structural design is simple reasonable.

In some embodiments, the connecting section and the limiting section are integrally formed. So, can form spacing portion fast, simple operation and efficient.

In some embodiments, the number of the limiting sections is at least two, and the limiting sections are arranged side by side at intervals. Therefore, the number and the distribution area of the limiting sections are increased, and the limiting effect of the limiting part on the connecting piece can be further enhanced.

In some embodiments, the end cap assembly further comprises a thermal insulation layer sandwiched between the end face and the limiting section. So, set up the insulating layer through the terminal surface at the fixed part and between spacing section, can effectively hinder the adaptor to overflow the heat radiation that produces.

In some embodiments, the thermal insulation layer is made of polyethylene terephthalate or ceramic. Therefore, by utilizing the heat insulation material, the heat radiation generated by overcurrent of the adapter can be effectively prevented.

In some embodiments, the adaptor includes a first adaptor portion and a second adaptor portion connected vertically, the electrode terminal penetrates through the end face and is connected with the first adaptor portion, and the second adaptor portion is connected with the electrode assembly of the battery cell. Therefore, the second adapter part of the adapter can be closer to the electrode assembly of the single battery, and the electrode assembly of the single battery can be conveniently connected through the second adapter part.

A battery monomer comprises a shell, an electrode assembly and the end cover assembly, wherein the shell is provided with an opening, the electrode assembly is arranged in the shell, and the opening is covered by a cover body. When the single battery is moved or vibrated, the over-current and external short circuit current resistance fusing capability of the end cover assembly is strong, and the local temperature overheating or fusing condition of the single battery can be reduced.

A battery comprises the battery cell. The battery is not easy to damage when being moved or vibrated, and has long service life.

An electric device comprises the battery. The battery of the electric equipment is not easy to damage when the electric equipment is moved or vibrated, and the energy supply time and the energy supply efficiency can be effectively prolonged.

Drawings

FIG. 1 is a schematic illustration of a vehicle according to an embodiment;

FIG. 2 is a schematic diagram of a battery according to an embodiment;

FIG. 3 is a schematic diagram of a battery cell according to an embodiment;

FIG. 4 is an unfolded schematic view of the limiting portion of the end cap assembly according to the first embodiment;

FIG. 5 is an exploded view of the end cap assembly shown in FIG. 4;

FIG. 6 is a schematic view of a stop portion of the endcap assembly of FIG. 4 shown bent;

FIG. 7 is a schematic view of an end cap assembly according to a second embodiment;

FIG. 8 is a schematic view of an end cap assembly of a third embodiment;

FIG. 9 is an unfolded schematic view of a limiting portion of an endcap assembly in accordance with a fourth embodiment;

FIG. 10 is a schematic view of a stop portion of the endcap assembly of FIG. 9 shown bent;

FIG. 11 is a schematic view of an end cap assembly of the fifth embodiment.

Reference numerals:

10. a vehicle; 11. a controller; 12. a motor; 20. a battery; 21. a box body; 21a, a first portion; 21b, a second portion; 22. a battery cell; 23. a housing; 23a, an opening; 24. an electrode assembly; 25. an end cap assembly; 100. a cover body; 200. an electrode terminal; 300. an adapter; 310. a first transition portion; 311. a second through hole; 320. a second transfer part; 400. an insulating member; 410. a fixed part; 411. a side surface; 412. an end face; 412a, a first via; 420. a limiting part; 420a, positioning holes; 420b, positioning columns; 421. a connecting section; 422. a limiting section; 500. an insulating layer.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

With the popularization and promotion of new energy automobiles, the charge and discharge performance, the cruising ability and the like of the new energy automobiles increasingly attract attention and attention of people. The power battery is a rechargeable battery, is a power source of the new energy automobile, and is widely applied to the field of the new energy automobile.

The service life of the battery is an important reference index, and the battery is easy to deform or damage due to vibration stress during transportation or when applied to moving equipment which can be subjected to vibration, so that the service life is terminated. In order to prevent the battery from being damaged, the casing and the cover plate of the battery are often made of high-strength and wear-resistant materials to improve the external structural strength of the battery. However, after the external structural strength of the battery is improved, the battery is still damaged after being moved or vibrated, and the situation that the local temperature of the battery is overheated or fused due to insufficient overcurrent of the adapter at the moment still exists.

Based on the above consideration, through intensive research, an end cover assembly, a battery cell, a battery and electric equipment are designed. In the free end cover subassembly of battery, locate between lid body and the adaptor with the insulating part, the insulating part is including the fixed part and the spacing portion that are connected, and the fixed part is located between lid body and the adaptor, and spacing portion is used for supporting and spacing adaptor. Therefore, when the single battery is moved or vibrated, the amplitude of the adapter in the moving or vibrating process can be limited through the limiting part of the insulating part, and the problem that the connecting position of the adapter and the electrode terminal is deformed or damaged due to repeated vibration stress is solved; meanwhile, a hole structure matched with the insulating part is not required to be additionally arranged on the adapter, the overcurrent and external short circuit current fusing resistance of the adapter can be improved, and the condition that local temperature is overheated or fused due to insufficient overcurrent of the adapter is reduced.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments will be described by taking a power-driven apparatus according to an embodiment of the present application as an example of the vehicle 10.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 10 according to some embodiments of the present disclosure. The vehicle 10 may be a fuel-oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. The interior of the vehicle 10 is provided with a battery 20, and the battery 20 may be provided at the bottom or at the head or tail of the vehicle 10. The battery 20 may be used for power supply of the vehicle 10, for example, the battery 20 may serve as an operation power source of the vehicle 10. The vehicle 10 may also include a controller 11 and a motor 12, with the controller 11 being used to control the battery 20 to power the motor 12, for example, for start-up, navigation, and operational power requirements while traveling of the vehicle 10. In other embodiments of the present application, the battery 20 may be used not only as an operating power source for the vehicle 10, but also as a driving power source for the vehicle 10, instead of or in part of fuel or natural gas to provide driving force for the vehicle 10.

Referring to fig. 2, fig. 2 is a schematic diagram of a battery 20 according to some embodiments of the present disclosure. The battery 20 includes a case 21 and a battery cell 22, and the battery cell 22 is accommodated in the case 21. The case 21 is used to provide a receiving space for the battery cells 22, and the case 21 may have various structures. In some embodiments, the case 21 may include a first portion 21a and a second portion 21b, the first portion 21a and the second portion 21b cover each other, and the first portion 21a and the second portion 21b together define a receiving space for receiving the battery cell 22. The second portion 21b may be a hollow structure with one open end, the first portion 21a may be a plate-shaped structure, and the first portion 21a covers the open side of the second portion 21b, so that the first portion 21a and the second portion 21b jointly define a receiving space; the first portion 21a and the second portion 21b may be both hollow structures with one side open, and the open side of the first portion 21a may cover the open side of the second portion 21 b. Of course, the first portion 21a and the second portion 21b may form the box 21 in various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 20, the battery cell 22 may be a plurality of battery cells 22, and the plurality of battery cells 22 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 22. The plurality of battery monomers 22 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 22 is accommodated in the box body 21; of course, the battery 20 may also be a module formed by connecting a plurality of battery cells 22 in series, in parallel, or in series-parallel, and then a plurality of battery modules 20 are connected in series, in parallel, or in series-parallel, to form a whole, and are accommodated in the box 21.

Wherein each battery cell 22 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cells 22 may be cylindrical, flat, rectangular, or other shapes, etc. In the present application, the battery cell 22 may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell 22 may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application.

As will be described in detail below with respect to any one of the cells 22, as shown in fig. 3, the cell 22 includes a case 23, an electrode assembly 24, and an end cap assembly 25. The housing 23 is a hollow rectangular parallelepiped or a cube, and one of the planes of the housing 23 has an opening 23a, and the plane is configured without a wall so that the housing 23 communicates inside and outside. The end cap assembly 25 covers the opening 23a and is coupled to the case 23 to form a closed cavity for housing the electrode assembly 24, and the closed cavity is filled with an electrolyte, such as an electrolytic solution.

Wherein the electrode assembly 24 has a first pole piece, a second pole piece and a diaphragm, the first pole piece, the second pole piece and the diaphragm are wound or stacked to form the electrode assembly 24, the first pole piece, the second pole piece and the diaphragm are not shown in the drawings of the application, but those skilled in the art will understand how the first pole piece, the second pole piece and the diaphragm are wound or stacked to form the electrode assembly 24, and detailed description thereof is omitted.

Referring to fig. 3 and 4, in an embodiment, the end cap assembly 25 is disposed on the battery cell 22, the end cap assembly 25 includes a cap body 100, an electrode terminal 200, an adaptor 300 and an insulating member 400, the electrode terminal 200 is fixed to the cap body 100, the adaptor 300 is used for connecting the electrode terminal 200 and the electrode assembly 24 of the battery cell 22, the insulating member 400 includes a fixing portion 410 and a limiting portion 420, which are connected, the fixing portion 410 is disposed between the cap body 100 and the adaptor 300, and the limiting portion 420 is used for abutting against the adaptor 300.

In the present application, the cover body 100 covers the opening 23a of the case 23 of the battery cell 22 to isolate the internal environment of the battery cell 22 from the external environment. The shape of the cap body 100 may be adapted to the shape of the housing 23 to fit the housing 23. Alternatively, the cap body 100 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the cap body 100 is not easily deformed when being impacted by the extrusion, and the battery cell 22 may have a higher structural strength and improved safety performance. The cap body 100 may be provided with functional components such as the electrode terminal 200, and may be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 22 reaches a threshold value. The material of the cap body 100 may also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

In the present application, the electrode terminal 200 is used to electrically connect with the electrode assembly 24 of the battery cell 22 to output or input electric power of the battery cell 22.

In the present application, the insulating member 400 is used to isolate the cover body 100 from the electrical connection members in the case 23 of the battery cell 22, thereby reducing the risk of short circuits. Illustratively, the insulator 400 may be plastic, rubber, or the like.

In the present application, the adaptor 300 is an electrical connection member for connecting the electrode terminal 200 and the tabs of the electrode assembly 24.

When the battery cell 22 is moved or vibrated, the end cap assembly 25 can limit the amplitude of the adaptor 300 in the moving or vibrating process through the limiting part 420 of the insulating member 400, and alleviate the problem that the connecting position of the adaptor 300 and the electrode terminal 200 is deformed or damaged due to repeated vibration stress; meanwhile, a hole structure matched with the insulating piece 400 is not required to be additionally arranged on the adapter piece 300, the overcurrent and external short circuit current fusing resistance of the adapter piece 300 can be improved, and the situation that local temperature is overheated or fused due to insufficient overcurrent of the adapter piece 300 is reduced.

According to some embodiments of the present disclosure, referring to fig. 5 and fig. 6, the fixing portion 410 includes a side surface 411 and an end surface 412 located at a different side from the side surface 411, the cover body 100 and the adaptor 300 are connected to the end surface 412, and the limiting portion 420 is connected to the side surface 411.

In the present embodiment, the fixing portion 410 has two opposite end surfaces 412, and the cap body 100 and the adaptor 300 are respectively connected to the two opposite end surfaces 412. In other embodiments, the fixing portion 410 may also have at least three end surfaces 412.

In the present embodiment, the end surface 412 of the fixing portion 410 is disposed perpendicular to the side surface 411 of the fixing portion 410 by 90 degrees. In other embodiments, the end surface 412 of the fixing portion 410 and the side surface 411 of the fixing portion 410 may be disposed at an angle different from 90 degrees.

Through the arrangement, the insulating piece 400 can be arranged between the cover body 100 and the adapter piece 300 to play the roles of insulation and vibration reduction, the limiting effect of the limiting part 420 on the adapter piece 300 is not influenced, and the structural design is simple and reasonable.

According to some embodiments of the present application, referring to fig. 6, the fixing portion 410 includes at least two side surfaces 411, and the limiting portion 420 is disposed on any one side surface 411 to limit the adaptor 300 from any side of the insulating member 400.

For example, as shown in fig. 6, when the number of the side surfaces 411 of the fixing portion 410 is four, the position-limiting portion 420 may be disposed on any one side surface 411 of the four side surfaces 411. At this time, the limiting portion 420 may be disposed to at least completely cover the adaptor 300, so as to enhance the limiting effect on the adaptor 300.

Through the above arrangement, the limiting part 420 is arranged on any side surface 411 of the fixing part 410, the limiting of the connecting piece 300 can be realized on any side of the insulating piece 400, and the limiting part 420 is more flexible to arrange.

According to some embodiments of the present application, referring to fig. 6, the fixing portion 410 includes at least two side surfaces 411, and at least two side surfaces 411 of all the side surfaces 411 are provided with a limiting portion 420 for limiting the position of the adaptor 300 from at least two sides of the insulating member 400.

Here, at least two side surfaces 411 of all the side surfaces 411 are provided with the stopper portions 420, and it is understood that two side surfaces 411 or more than two side surfaces 411 of all the side surfaces 411 are provided with the stopper portions 420, respectively. The shape and size of the position-limiting portion 420 of each side 411 may or may not be identical.

For example, as shown in fig. 6, when the fixing portion 410 includes four side surfaces 411, two side surfaces 411 of the four side surfaces 411 are respectively provided with a limiting portion 420. At this time, the limiting portion 420 may be disposed to at least completely cover the adaptor 300, so as to enhance the limiting effect on the adaptor 300. The shape and size of the limiting portion 420 of each side 411 are identical.

In other embodiments, when the fixing portion 410 includes four side surfaces 411, three side surfaces 411 or four side surfaces 411 of the four side surfaces 411 are respectively provided with the position-limiting portion 420. The shape and size of the position-limiting portion 420 of each side 411 may not be completely the same.

Through the above arrangement, at least two side surfaces 411 of the fixing portion 410 are provided with the limiting portions 420, so that the limiting and vibration damping effects of the limiting portions 420 of the insulating member 400 on the connecting member 300 can be enhanced.

According to some embodiments of the present disclosure, please refer to fig. 7 and 8, the limiting portions 420 corresponding to each two opposite side surfaces 411 are at least partially overlapped.

Here, the limiting portions 420 corresponding to each two side surfaces 411 at least partially overlap, that is, the limiting portions 420 corresponding to each two side surfaces 411 at least partially overlap with each other.

It should be noted that the joints of the limiting portions 420 corresponding to each of the two side surfaces 411 can be detachably connected in various manners such as plugging, clipping, or locking.

Through the above arrangement, the limiting portions 420 disposed on the two opposite sides of the fixing portion 410 are overlapped, so that the limiting effect of the limiting portions 420 on the connecting member 300 can be further enhanced.

According to some embodiments of the present disclosure, please refer to fig. 8, in the two opposite side surfaces 411, the position-limiting portion 420 corresponding to one side surface 411 is provided with a positioning hole 420a, the position-limiting portion 420 corresponding to the other side surface 411 is provided with a positioning post 420b, and the positioning post 420b is inserted into the positioning hole 420a when the two position-limiting portions 420 are overlapped.

In this embodiment, the positioning hole 420a is a circular hole, and the positioning post 420b is cylindrical. In other embodiments, the positioning hole 420a may also be a square hole or a hole with another shape, and the positioning post 420b may also be a rectangular parallelepiped or another shape.

In the present embodiment, the number of the positioning holes 420a and the positioning posts 420b is one. In other embodiments, the number of the positioning holes 420a and the positioning posts 420b may be at least two. Here, the number of the positioning holes 420a and the positioning posts 420b is not particularly limited.

In the present embodiment, the positioning post 420b and the limiting portion 420 are integrally formed, and have good integrity and high mechanical strength. In other embodiments, the positioning post 420b and the limiting portion 420 may be a split structure, and the two are connected by welding or hot melting.

Through the arrangement, the limiting parts 420 at the two opposite sides of the fixing part 410 can be fixedly overlapped, and heat can be prevented from being transferred to the electrode assembly 24 of the battery unit 22.

According to some embodiments of the present disclosure, referring to fig. 8, the limiting portion 420 includes a connecting section 421 and a limiting section 422, the connecting section 421 is connected to the side 411 of the fixing portion 410, and the limiting section 422 is used for supporting the adaptor 300.

In the present embodiment, the connecting portion 421 and the limiting portion 422 are vertically connected by 90 degrees. In other embodiments, the connecting section 421 and the position-limiting section 422 can also be disposed at an included angle different from 90 degrees.

In the embodiment, the position-limiting portion 420 and the fixing portion 410 are integrally formed, that is, the connecting portion 421 and the fixing portion 410 are integrally formed, so that the integrity is good and the mechanical strength is high. In other embodiments, the position-limiting portion 420 and the fixing portion 410 may also be a split structure, and the connecting section 421 of the position-limiting portion 420 may be fixed to the fixing portion 410 by gluing or hot-melting.

According to some embodiments of the present application, please refer to fig. 8, the connecting portion 421 and the limiting portion 422 are integrally formed. Therefore, the limiting part 420 can be formed quickly, and the operation is convenient and efficient.

It should be noted that, in other embodiments, the connecting section 421 and the limiting section 422 may also be a split structure, and the connecting section 421 and the limiting section 422 may be movably connected by a hinge or other connecting members.

Through the arrangement, the connecting section 421 of the limiting part 420 is connected to the fixing part 410, the limiting section 422 of the limiting part 420 can limit the connecting piece 300, and the structural design is simple and reasonable.

Specifically, referring to fig. 8, the position-limiting portion 420 is an integrally formed structure and is bent by heat melting to form a connecting section 421 and a position-limiting section 422 connected at an included angle.

Here, the material of the position-limiting portion 420 is plastic, and the plastic can be bent and deformed under a hot melting condition, so as to form a connecting section 421 and a position-limiting section 422 connected at an included angle.

It should be noted that, in other embodiments, the material of the position-limiting portion 420 may also be other polymer insulating materials besides plastic. Correspondingly, the position-limiting portion 420 can be bent and deformed by a method (e.g., heating, polishing or welding) other than hot-melt bending, so as to form the connecting section 421 and the position-limiting section 422 connected at an included angle.

Through the setting, the limiting part 420 formed integrally is bent through hot melting, the connecting section 421 and the limiting section 422 connected by included angles can be formed quickly, and the operation is convenient and efficient.

According to some embodiments of the present disclosure, please refer to fig. 9 and 10, the number of the limiting segments 422 is at least two, and the limiting segments 422 are arranged side by side at intervals.

In the present embodiment, the shape and size of each of the limiting segments 422 are identical. For example, as shown in fig. 10, the number of the position-limiting segments 422 of each position-limiting portion 420 is two, the two position-limiting segments 422 are rectangular and equal in size, and the two position-limiting segments 422 are arranged on the same side of the position-limiting portion 420 at intervals side by side.

In other embodiments, the shape and size of each spacing segment 422 may not be identical. For example, the number of the position-limiting segments 422 of each position-limiting portion 420 is two, one of the position-limiting segments 422 is rectangular, the other position-limiting segment 422 is arc-shaped, and the two position-limiting segments 422 are arranged on the same side or different sides of the position-limiting portion 420 at intervals side by side.

Through the arrangement, the number and the distribution area of the limiting sections 422 are increased, and the limiting effect of the limiting part 420 on the connecting piece 300 can be further enhanced.

Specifically, referring to fig. 9 and 10, the position-limiting section 422 is in any one of a rectangle, a triangle, a pentagon or an arc shape.

For example, when the area of the adaptor 300 is large and the shape is regular, the limiting section 422 of the limiting portion 420 may be set to be rectangular, so as to facilitate the setting of the limiting section 422 and ensure the limiting effect on the adaptor 300; when the area of the adaptor 300 is small and the shape is irregular or the arrangement position of the position-limiting portion 420 is limited, the position-limiting section 422 of the position-limiting portion 420 may be set to be any one of a triangle, a pentagon or an arc, so as to meet the actual design requirement.

Through the arrangement, the shape of the limiting section 422 can be flexibly arranged according to the size of the adapter 300, so that the limiting part 420 can effectively limit the adapter 300.

Referring to fig. 11, according to some embodiments of the present application, the end cap assembly 25 further includes a thermal insulation layer 500, and the thermal insulation layer 500 is sandwiched between the end face 412 and the limiting section 422.

It should be noted that the number of the thermal insulation layers 500 is not limited to one, and the number of the thermal insulation layers 500 may be at least two, and each thermal insulation layer 500 is stacked between the end face 412 and the spacing segment 422 in a stacked structure. The materials of the heat insulation layers 500 may be the same or not completely the same, and are set according to actual requirements.

It can be understood that, by disposing the thermal insulation layer 500 between the end surface 412 of the fixing portion 410 and the limiting section 422, the thermal radiation generated by the overcurrent of the adaptor 300 can be effectively blocked.

According to some embodiments herein, referring to fig. 11, insulation layer 500 may be polyethylene terephthalate or ceramic. Therefore, by using the heat insulation material, the heat radiation generated by the overcurrent of the adaptor 300 can be effectively blocked.

It should be noted that insulation layer 500 may be other types of insulation materials.

According to some embodiments of the present disclosure, referring to fig. 5 and 3, the adaptor 300 includes a first adaptor portion 310 and a second adaptor portion 320 connected vertically, the electrode terminal 200 penetrates through the end surface 412 and is connected to the first adaptor portion 310, and the second adaptor portion 320 is connected to the electrode assembly 24 of the battery cell 22.

Here, the end surface 412 of the fixing portion 410 of the insulating member 400 is provided with a first through hole 412a, the first transfer portion 310 is provided with a second through hole 311, and the electrode terminal 200 is inserted through the first through hole 412a and mounted to the second through hole 311, thereby achieving connection between the electrode terminal 200 and the first transfer portion 310.

In the present embodiment, the first adapter 310 and the second adapter 320 are integrally formed, and have good integrity and high mechanical strength. In other embodiments, the first adapter portion 310 and the second adapter portion 320 may be a split structure, and they may be fixed by welding or riveting.

With the above arrangement, the second adaptor part 320 of the adaptor 300 can be brought closer to the electrode assembly 24 of the battery cell 22, facilitating connection of the electrode assembly 24 of the battery cell 22 through the second adaptor part 320.

Referring to fig. 3, in an embodiment, the battery cell 22 includes a case 23, an electrode assembly 24 and the end cap assembly 25, the case 23 has an opening 23a, the electrode assembly 24 is disposed in the case 23, and the cap body 100 covers the opening 23 a.

In the present application, the case 23 is an assembly for cooperating with the cover body 100 to form an internal environment of the battery cell 22, wherein the formed internal environment may be used to house the electrode assembly 24, the electrolyte, and other components. The case 23 and the cover body 100 may be separate members, and an opening 23a may be provided on the case 23, and the cover body 100 may cover the opening 23a at the opening 23a to form an internal environment of the battery cell 22. Without limitation, the housing 23 and the cover body 100 may be integrated, and specifically, the housing 23 and the cover body 100 may form a common connecting surface before other components are inserted into the housing, and when it is necessary to enclose the inside of the housing 23, the housing 23 and the cover body 100 are closed. The housing 23 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 23 may be determined according to the specific shape and size of the electrode assembly 24. The material of the housing 23 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

In the present application, the electrode assembly 24 is a component in the battery cell 22 where electrochemical reactions occur. One or more electrode assemblies 24 may be contained within the case 23. The electrode assembly 24 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The parts of the positive plate and the negative plate with the active materials form the main body part of the electric core assembly, and the parts of the positive plate and the negative plate without the active materials form the tabs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 20, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminal 200 to form a current loop.

When the single battery 22 is moved or vibrated, the over-current and external short circuit current resistance fusing capability of the end cap assembly 25 is strong, and the local temperature overheating or fusing of the single battery 22 can be reduced.

Referring to fig. 2, a battery 20 in an embodiment includes the battery cell 22. Thus, the battery 20 is not easily damaged when being moved or vibrated, and has a long service life.

Referring to fig. 1, an embodiment of the power consumption device includes the battery 20, and the battery 20 is used for supplying power to the power consumption device. The battery 20 is not easy to be damaged when the electric equipment is moved or vibrated, and the energy supply time and the energy supply efficiency can be effectively prolonged.

According to some embodiments of the present disclosure, please refer to fig. 3, an end cap assembly 25 in an embodiment is disposed on a battery cell 22, and referring to fig. 5 and 11 in combination, the end cap assembly 25 includes a cap body 100, an electrode terminal 200, an adaptor 300, an insulating member 400 and a heat insulation layer 500, the electrode terminal 200 is fixed on the cap body 100, the adaptor 300 is used for connecting the electrode terminal 200 and an electrode assembly 24 of the battery cell 22, the insulating member 400 includes a fixing portion 410 and a limiting portion 420, the fixing portion 410 is disposed between the cap body 100 and the adaptor 300, and the limiting portion 420 is used for abutting against the adaptor 300.

The fixing portion 410 includes a side surface 411 and an end surface 412 located at a different side from the side surface 411, the cover body 100 and the adaptor 300 are connected to the end surface 412, and the limiting portion 420 is connected to the side surface 411. The fixing portion 410 includes at least two side surfaces 411, and at least two side surfaces 411 of all the side surfaces 411 are provided with limiting portions 420. In the two opposite side surfaces 411, the position-limiting portion 420 corresponding to one side surface 411 is provided with a positioning hole 420a, the position-limiting portion 420 corresponding to the other side surface 411 is provided with a positioning post 420b, and the positioning post 420b is inserted into the positioning hole 420a when the two position-limiting portions 420 are overlapped. The limiting portion 420 is of an integrally formed structure, and is bent by hot melting to form a connecting section 421 and a limiting section 422 connected at an included angle, the limiting section 422 is any one of a rectangle, a triangle, a pentagon or an arc, and the heat insulation layer 500 is sandwiched between the end face 412 and the limiting section 422. The adaptor 300 includes a first adaptor portion 310 and a second adaptor portion 320 which are vertically connected, the electrode terminal 200 is inserted through the end surface 412 and connected to the first adaptor portion 310, and the second adaptor portion 320 is connected to the electrode assembly 24 of the battery cell 22.

According to some embodiments of the present disclosure, referring to fig. 3, a battery cell 22 in one embodiment includes a case 23, an electrode assembly 24 and the end cap assembly 25, the case 23 has an opening 23a, the electrode assembly 24 is disposed in the case 23, and the cap body 100 covers the opening 23 a.

According to some embodiments of the present application, please refer to fig. 2, an embodiment of a battery 20 includes the battery cell 22.

According to some embodiments of the present application, referring to fig. 1, an embodiment of the power consumer includes the battery 20, and the battery 20 is used for supplying power to the power consumer.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (15)

1. An end cap assembly for a battery cell, the end cap assembly comprising:

a cap body (100);

an electrode terminal (200) fixed to the cap body (100);

an adaptor (300) for connecting the electrode terminal (200) and an electrode assembly (24) of the battery cell;

the insulating piece (400) comprises a fixing part (410) and a limiting part (420) which are connected, the fixing part (410) is arranged between the cover body (100) and the adapter piece (300), and the limiting part (420) is used for abutting against the adapter piece (300).

2. The end cap assembly of claim 1, wherein the fixing portion (410) comprises a side surface (411) and an end surface (412) located at a different side from the side surface (411), the cap body (100) and the adaptor (300) are connected to the end surface (412), and the limiting portion (420) is connected to the side surface (411).

3. The end cap assembly of claim 2, wherein the fixing portion (410) comprises at least two side surfaces (411), and the restraining portion (420) is provided on any one of the side surfaces (411) to restrain the adaptor (300) from either side of the insulator (400).

4. End cap assembly according to claim 2, wherein the fixing part (410) comprises at least two of the side surfaces (411), at least two of the side surfaces (411) of all the side surfaces (411) being provided with the retaining part (420) for retaining the adaptor (300) from at least two sides of the insulator (400).

5. An end cap assembly according to claim 4, wherein the retaining portions (420) of each two of the oppositely disposed sides (411) at least partially overlap.

6. The end cap assembly of claim 5, wherein, in the two opposite side surfaces (411), the position-limiting portion (420) corresponding to one side surface (411) is provided with a positioning hole (420 a), the position-limiting portion (420) corresponding to the other side surface (411) is provided with a positioning post (420 b), and the positioning post (420 b) is inserted into the positioning hole (420 a) when the two position-limiting portions (420) are overlapped.

7. The end cap assembly of claim 2, wherein the position-limiting portion (420) comprises a connecting section (421) and a position-limiting section (422), the connecting section (421) is connected to the side surface (411) of the fixing portion (410), and the position-limiting section (422) is used for abutting against the adaptor (300).

8. The end cap assembly of claim 7, wherein the connecting segment (421) and the retaining segment (422) are integrally formed.

9. The end cap assembly of claim 7, wherein the number of the retaining segments (422) is at least two, and each of the retaining segments (422) are spaced apart side-by-side.

10. The end cap assembly of claim 7, further comprising an insulating layer (500), the insulating layer (500) sandwiched between the end face (412) and the spacing segment (422).

11. An end cap assembly according to claim 10, wherein the insulating layer (500) is of polyethylene terephthalate or ceramic.

12. The end cap assembly of claim 2, wherein the adaptor (300) comprises a first adaptor portion (310) and a second adaptor portion (320) which are vertically connected, the electrode terminal (200) penetrates through the end face (412) and is connected with the first adaptor portion (310), and the second adaptor portion (320) is connected with the electrode assembly (24) of the battery cell.

13. A battery cell, comprising:

a housing (23) having an opening (23 a);

an electrode assembly (24) disposed within the case (23);

the end cap assembly of any one of claims 1-12, said cap body (100) covering said opening (23 a).

14. A battery comprising the cell of claim 13.

15. An electrical device comprising the battery of claim 14.

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